RSS Feed Error when using W3 Total Cache

This is the error I am getting

XML Parsing Error: junk after document element
Location: https://dkk.dezertdezinez.com/blog/feed/
Line Number 1, Column 205:<!– ngg_resource_manager_marker –><div style=”text-align: center;”>Optimization WordPress Plugins & Solutions by W3 EDGE</div> <div style=”display:none”>
—————————————————————————————————————————————————————————————————————-^

My site is DKK Site

I am using 3.8.2 wordpress and have several plugins on the site .

I have turned off the plugins then tried the RSS then turned on one at a time and still not sure how to fix the problem ..

Still have not figured this out

Any help would be great thank you.

https://www.ads-software.com/plugins/w3-total-cache/